That is 8001 guys.
Given that there are 86400 seconds in a day then for this to be plausible they had to last around 10 seconds (which in that case he could have sucked 8640)
So maybe some guys last a little longer or shorter but the idea is that most of these guys had to get off pretty damn quickly. Even worse, it says he did it in one night. So either there are 8001 premature ejaculators or Arnold Schwarzenegger is the best dick sucker in the universe.